Lead-free environment-friendly bismuth bronze alloy material

Abstract

The invention particularly relates to a lead-free environment-friendly bismuth bronze alloy material, belonging to the technical field of alloy materials. The composed chemical elements of the alloy material are as follows: lead smaller than or equal to 0.2%, aluminum smaller than or equal to 0.1%, iron smaller than or equal to 0.20%, 5.0%-8.0% of zinc, 4.0%-6.0% of tin, 0.8%-3.0% of bismuth, nickel smaller than or equal to 0.6%, phosphorus smaller than or equal to 0.05%, silicon smaller than or equal to 0.1%, arsenic smaller than or equal to 0.25%, the balance of copper and inevitable impurities. The alloy has excellent casting performance, corrosion resistance and subsequent machining performance, is particularly suitable for casting pieces, valves and the like of a power supply system, and is a metal material beneficial to human health and environmental protection.

Description

technical field [0001] The invention relates to a bronze alloy, in particular to a lead-free and environmentally friendly bismuth bronze alloy material which is easy to cut and has excellent casting performance, corrosion resistance and subsequent machining performance. They are especially suitable for water supply system castings, valves, etc. They are metal materials that are beneficial to human health and environmental protection, and are also excellent substitutes for lead brass and lead-containing bronze that are widely used at present and cause adverse effects on human body and environment. . Background technique [0002] Casting bronze is easy to manufacture castings with complex shapes. Bronze castings have good corrosion resistance, pressure resistance and wear resistance, and some of them are used for water supply system castings and valve parts. Cast tin bronze has excellent corrosion resistance, especially in the atmosphere, fresh water, sea water, alkaline solu...

AI Technical Summary

Problems solved by technology

However, the above-mentioned bronze-based low-lead alloys ensure high-temperature tensile properties, and when they are used in casting, especially gravity casting, many casting defects will appear, and the casting performance of lead-containing bronze is greatly reduced, which affects its application in the metal forming industry.

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